A breakthrough has been achieved in corrosion-resistant technology for offshore wind turbine brakes, boosting their durability in salt-spray environments by a factor of three.
2025-12-15
In the offshore wind power sector, brakes—being critical components that ensure the safe operation of equipment—have their corrosion resistance directly affecting the equipment’s service life and maintenance costs.
In the offshore wind power sector, brakes—critical components ensuring the safe operation of equipment—have their corrosion resistance directly impacting equipment lifespan and maintenance costs. Recently, a domestic research team has achieved a significant breakthrough in brake corrosion-resistant technology by innovating materials and optimizing processes, specifically addressing the core challenge of salt-spray corrosion.
In marine environments where salt-spray concentrations exceed the standard, conventional brakes are prone to issues such as pitting corrosion and crevice corrosion caused by chloride ion penetration, leading to a decline in structural strength and functional failure. The newly developed anti-corrosion technology adopts a dual approach—“composite coating plus structural optimization.” On one hand, an epoxy-polyurethane interpenetrating network resin is used as the primer coating to form a dense physical barrier with a cross-linking density of 2.3 g/cm³, effectively preventing salt-spray penetration. On the other hand, graphene nanosheets are incorporated into the coating, leveraging their two-dimensional structure to create an electrochemical protective layer that reduces the corrosion current density to below 0.1 μA/cm². Furthermore, for the critical contact surfaces of the brake, an elastic coating containing ceramic particles has been developed, offering both excellent wear resistance and impact resistance; in simulated sand-and-dust impact tests, the wear amount was only 0.03 mm per 1,000 hours.
Tested and verified through actual measurements, brakes employing this technology have tripled their service life in salt-spray environments, and their maintenance cycle has been extended from two years to six years, significantly reducing lifecycle costs. Currently, this technology has been applied to 18-megawatt offshore wind turbine units, providing a reliable guarantee for the development of deepwater offshore wind power.
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